I propose a single, quick method for measuring ammonia in urine and urea in plasma and urine. An ammonia-selective electrodie is used, set up on a microcell, which allows use of small sample volumes. Ammonia is measured directly after partial conversion of ammonium ions to NH3. Urea is measured after its hydrolysis by urease. With urine, the two procedures can be carried out successively in the...

We present high angular resolution observations of the NH3(1,1), (2,2) and (3,3) inversion transitions from the Egg Nebula, the archetypical proto-planetary nebula. The spatial distribution and kinematics of the emission in all three lines show four distinct components or lobes that are aligned with the polar and equatorial directions. The kinematics of the NH3 emission is also found to follow ...

Copper oxide nanoparticles within hollow mesoporous silica spheres were prepared by binding/adsorbing Cu2+ or [Cu(NH3)4(H2O)2]2+ ions on the surface of carbon spheres, followed by formation of a mesoporous silica shell by sol-gel processing and calcination in air. The CuO nanoparticles can subsequently be converted into Cu3N nanoparticles by nitridation with ammonia. The effect of the different...

Swine wastewater is characterized by high organic matter content, solids, nitrogen (expressed as total ammonia and protein) and heavy metals. This work determines the methanogenic toxicity effect of free ammonia contained in swine wastewater comparing raw swine wastewater (RW) and the liquid fraction of swine wastewater (TW). The values of IC50 (50% of inhibition) obtained for methanogenic bact...

ND2H has been detected for the first time in the dense core of L134N, at the peak ammonia position. The abundance ratio [ND2H]/[NH2D] is 0.05, a slightly smaller value than the deuterium fractionation observed for ammonia [NH2D]/[NH3] ∼ 0.1 (Tiné et al. 2000). This is the second doubly deuterated species detected so far in the interstellar medium, and the first one in a cold dense core. The che...

Thermal-driven refrigeration systems have attracted increasing research and development interest in recent years. These systems do not cause ozone depletion and can reduce demand on electricity. The main objective of this work is to perform theoretical analyses of a thermal-driven refrigeration system using a new sorbent-sorptive pair as the working pair. The active component of sorbent is sodi...

UNLABELLED Indoor surfaces have a sorptive capacity for organic pollutants which may be significantly influenced by other gases and the pH of the surface. In this research, we examine the influence of a common indoor gaseous acid, CO2, and base, NH3, on the adsorption of a volatile organic base, trimethylamine (TMA), to a mineral surface, zirconium silicate beads. Varying ammonia and CO2 within...

The number of dairy cows in Idaho has increased by approximately 80% in the last decade with concentrated dairy production facilities being the norm. The majority of these production facilities are located in southern Idaho, which has generated regional air quality concerns. To determine the potential air quality impacts of these facilities, we determined emissions of ammonia (NH3) and methane ...

Ammonia (NH3) is recognized as a carbon-free hydrogen-carrier fuel with high content of hydrogen atoms per unit volume. Recently, ammonia has received increasing attention promising alternative for internal combustion engine and gas turbine applications. However, the viability fueling future devices several barriers to overcome. To overcome challenge its low reactivity, it proposed blend high-r...

A biofilter inoculated with Arthrobacter sp. was applied to the simultaneous elimination of trimethylamine (TMA) and ammonia (NH3) from the exhaust air of swine waste storage pits. The results showed that the biofilter achieved average removal efficiencies of 96.8+/-2.5% and 97.2+/-2.3% for TMA and NH3, respectively. A near-neutral pH (7.3-7.4) was maintained due to the accumulation of acid met...